Cryptic Crossword: 7x5

The whales are starting to learn new tricks - but they still can't solve Cryptic Crosswords. That's what separates us from the animals. If you don't solve these clues, it means the filthy beasts have won.

1		2		3		4
5
6

Across

1. American car for esteemed French lady, we hear. (5,2)
5. Gold found by FBI agents. Treasury starts to increase. (7)
6. Football player wrapped in sheet makes frozen dessert. (7)

Down

1. Aquatic bird rises against gravity and bites. (5)
2. Debate Republican caught in fever. (5)
3. Database shelters itty-bitty nerd. (5)
4. Salute to music includes sacred choral work, played backwards. (5)